113707521 has 12 divisors (see below), whose sum is σ = 169908180. Its totient is φ = 73190880.

The previous prime is 113707513. The next prime is 113707553. The reversal of 113707521 is 125707311.

It is a happy number.

113707521 is a `hidden beast` number, since 1 + 137 + 0 + 7 + 521 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26378496 + 87329025 = 5136^2 + 9345^2 .

It is not a de Polignac number, because 113707521 - 2³ = 113707513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (113707511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217570 + ... + 218091.

It is an arithmetic number, because the mean of its divisors is an integer number (14159015).

Almost surely, 2^113707521 is an apocalyptic number.

It is an amenable number.

113707521 is a deficient number, since it is larger than the sum of its proper divisors (56200659).

113707521 is a wasteful number, since it uses less digits than its factorization.

113707521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435696 (or 435693 counting only the distinct ones).

The product of its (nonzero) digits is 1470, while the sum is 27.

The square root of 113707521 is about 10663.3728716574. The cubic root of 113707521 is about 484.4657325750.

The spelling of 113707521 in words is "one hundred thirteen million, seven hundred seven thousand, five hundred twenty-one".